Soak the wooden skewers in cold water for 30 minutes. This will prevent the skewers from burning on the barbecue.
Place all of the marinade ingredients in a large bowl and stir until the sugar has dissolved.
Toss the prawns in the marinade and leave in the fridge for at least 1 hour.
Once marinated, thread alternate prawns & mango cubes onto the skewers; this will make approximately 12 skewers.
Pre-heat a barbecue or grill pan and spray lightly with olive oil. Cook the kebabs on the hot grill for 2 minutes on each side or until the prawns are cooked through.
To make the dip: Mix the mashed avocado, sweet chilli sauce, 1 tablespoon of lime juice and the chilli together and season with cracked pepper. Cover and refrigerate until ready to serve.
At the last minute, mix half of the fresh coriander through the prepared dip.
Serve the prawn & Calypso® skewers on a layer of fresh baby salad leaves, topped with remaining fresh coriander and a large dollop of dip on the side.